soal dan latihan-usaha,daya, energy.pptx
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SOAL DAN LATIHANEXERCISE
ENERGY, USAHA,DAN DAYA
ENERGY, WORK, AND POWER
ENERGY, WORK, POWER
1. What is the Kinetic Energy of 100 kg of water moving at 1,2 m/s?
2. Amy uses 20-N of force to push a lawn mower 10meters. How
much work does she do?
3. Frank does 2400-J of work in climbing a set of stairs. If he does
the work in 6 seconds, what is his power output?
4. A girl weighing 420 Newtons takes 55 seconds to climb a flight of
stairs 18 meters high. What is her power output vertically?
ENERGY, WORK, POWER
5. How much work does an elephant do while moving a circus
wagon 20 meters with a pulling force of 200-N?
6. A 40 N force is used to push a 2.00 kg cart a distance of 5 meters.
What is the work done on the cart?
7. A 900-N mountain climber scales a 100 meter cliff. How much
work is done by the mountain climber?
8. A small motor does applies a 200N force over 10m in 20 seconds.
What is the power of the motor in watts?
ENERGY, WORK, POWER
9. If a small motor does 520 J of work to move a toy car 260 m,
what force does it exert?
10. Tuti is playing tug-of-war against Ati and Ani. Tuti pulls a 150 N,
Ati with a 125 N force, and Ani with 100 N force. The rope moves
2 m from its initial position. Determine :
a. Each work done by Tuti, Ati, and Ani
b. The total work done by Tuti, Ati, and Ani together.
c. To which side the rope moves?
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